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Re: [Qemu-devel] [PATCH] display: stop using DT_NOGRAPHIC, use DT_NONE

From: Anthony Liguori
Subject: Re: [Qemu-devel] [PATCH] display: stop using DT_NOGRAPHIC, use DT_NONE
Date: Tue, 09 Jul 2013 15:45:42 -0500
User-agent: Notmuch/0.15.2+202~g0c4b8aa (http://notmuchmail.org) Emacs/23.3.1 (x86_64-pc-linux-gnu)

Michael Tokarev <address@hidden> writes:

> 09.07.2013 22:37, Anthony Liguori wrote:
>> Michael Tokarev <address@hidden> writes:
>>> It looks like initially there was -nographic option to turn
>>> off display, now there's another option of the same sort,
>>> -display none.  But code in other places of qemu checks for
>>> DT_NOGRAPHIC and does not work well with -display none.
>>> Make DT_NOGRAPHIC an internal version which selects DT_NONE,
>>> and check for that in all other places where previously we
>>> checked for DT_NOGRAPHIC.
> []
>> Breaks make check:
>> main-loop: WARNING: I/O thread spun for 1000 iterations
>> **
>> ERROR:/home/aliguori/git/qemu/tests/fw_cfg-test.c:63:test_fw_cfg_nographic: 
>> assertion failed (qfw_cfg_get_u16(fw_cfg, FW_CFG_NOGRAPHIC) == 0): (1 == 0)
>> GTester: last random seed: R02S25031265f05e4d41efcf758c9ef6043b
> Sure, because the test is bogus.

No, it's a guest ABI.  You cannot change the guest ABI.

-display none != -nographic.

nographic gives you -display none plus a stdio serial port (with muxing

-display none should not imply stdio serial port.  The vc goes to a
dummy display.  That's a major semantic difference.


Anthony Liguori

> Should I remove this bogus test?
> Thanks,
> /mjt

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